Xen project Mailing List

Re: [Xen-devel] Unable to add disk on ARM64

To: Roger Pau Monné <roger.pau@xxxxxxxxxx>

From: Peng Fan <van.freenix@xxxxxxxxx>

Date: Sat, 13 Aug 2016 10:48:18 +0800

Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Julien Grall <julien.grall@xxxxxxx>, sstabellini@xxxxxxxxxx

Delivery-date: Sat, 13 Aug 2016 02:49:25 +0000

List-id: Xen developer discussion <xen-devel.lists.xen.org>

Hi Julien, Roger On Fri, Aug 12, 2016 at 04:57:06PM +0200, Roger Pau Monné wrote: >On Fri, Aug 12, 2016 at 03:00:34PM +0200, Julien Grall wrote: >> On 12/08/2016 14:24, Peng Fan wrote: >> > Hi, >> >> Hello Peng, >> >> I have CCed Roger who is more familiar than me with the hotplug scripts. >> >> > I am using xen master branch on i.MX8 ARM64. >> > >> > My xl configuration: >> > >> > kernel = "/root/xen/Image" >> > memory = "128" >> > name = "DomU" >> > vcpus = 1 >> > serial="pty" >> > disk = [ 'phy:/dev/loop0,xvda,w' ] >> > extra = "console=hvc0 root=/dev/xvda debug=/bin/sh" >> > >> > >> > And I "losetup /dev/loop0 /root/DomU-rootfs" in Dom0 Linux. >> > >> > But I met the following error: >> > libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to >> > execute: /etc/xen/scripts/block add ^M^M >> > Device /dev/loop0 is mounted in the privileged domain,^M^M >> > and so cannot be mounted by a guest.^M^M >> > libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: >> > /etc/xen/scripts/block add [800] exited with error status 1^M^M >> > libxl: debug: libxl_event.c:686:libxl__ev_xswatch_deregister: watch >> > w=0xfee100: deregister unregistered^M^M >> > libxl: error: libxl_devi >> > ce.c:1202:device_hotplug_child_death_cb: script: Device /dev/loop0 is >> > mounted in the privileged domain,^M^M >> > and so cannot be mounted by a guest.^M^M >> >> From my understanding, you have mounted /dev/loop0 in Dom0, is that correct? >> However, we don't support sharing the same mounting point by default (Roger >> can you confirm). No I only do "losetup /dev/loop0 DomU-rootfs". And I not mount it. > >It seems like the hotplug script has detected that you have the device >already attached to Dom0, can you paste the output of `xenstore-ls -fp` >when this happens? I add xenstore-ls -fp in /etc/xen/scripts/block. " test -b "$dev" || fatal "$dev is not a block device." xenstore-ls -fp ---> Here claim_lock "block" check_device_sharing "$dev" "$mode" ---> seems fail in this function " I use busybox, not sure whether it supports the xen scripts well or not. such as "losetup -a" is not supported by busybox. Log: device_hotplug: calling hotplug script: /etc/xen/scripts/block add libxl: debug: libxl_device.c:1135:device_hotplug: extra args: libxl: debug: libxl_device.c:1143:device_hotplug: env: libxl: debug: libxl_device.c:1150:device_hotplug: script: /etc/xen/scripts/block libxl: debug: libxl_device.c:1150:device_hotplug: XENBUS_TYPE: vbd libxl: debug: libxl_device.c:1150:device_hotplug: XENBUS_PATH: backend/vbd/1/51712 libxl: debug: libxl_device.c:1150:device_hotplug: XENBUS_BASE_PATH: backend libxl: debug: libxl_aoutils.c:593:libxl__async_exec_start: forking to execute: /etc/xen/scripts/block add /tool = "" (n0) /tool/xenstored = "" (n0) /local = "" (n0) /local/domain = "" (n0) /local/domain/0 = "" (n0) /local/domain/0/domid = "0" (n0) /local/domain/0/name = "Domain-0" (n0) /local/domain/0/backend = "" (n0) /local/domain/0/backend/vbd = "" (n0) /local/domain/0/backend/vbd/1 = "" (n0) /local/domain/0/backend/vbd/1/51712 = "" (n0,r1) /local/domain/0/backend/vbd/1/51712/frontend = "/local/domain/1/device/vbd/51712" (n0,r1) /local/domain/0/backend/vbd/1/51712/params = "/dev/loop0" (n0,r1) /local/domain/0/backend/vbd/1/51712/script = "/etc/xen/scripts/block" (n0,r1) /local/domain/0/backend/vbd/1/51712/frontend-id = "1" (n0,r1) /local/domain/0/backend/vbd/1/51712/online = "1" (n0,r1) /local/domain/0/backend/vbd/1/51712/removable = "0" (n0,r1) /local/domain/0/backend/vbd/1/51712/bootable = "1" (n0,r1) /local/domain/0/backend/vbd/1/51712/state = "2" (n0,r1) /local/domain/0/backend/vbd/1/51712/dev = "xvda" (n0,r1) /local/domain/0/backend/vbd/1/51712/type = "phy" (n0,r1) /local/domain/0/backend/vbd/1/51712/mode = "w" (n0,r1) /local/domain/0/backend/vbd/1/51712/device-type = "disk" (n0,r1) /local/domain/0/backend/vbd/1/51712/discard-enable = "1" (n0,r1) /local/domain/1 = "" (n0,r1) /local/domain/1/vm = "/vm /63997893-f587-4bdc-9bf3-dd5c7614bb51" (n0,r1) /local/domain/1/name = "DomU" (n0,r1) /local/domain/1/cpu = "" (n0,r1) /local/domain/1/cpu/0 = "" (n0,r1) /local/domain/1/cpu/0/availability = "online" (n0,r1) /local/domain/1/memory = "" (n0,r1) /local/domain/1/memory/static-max = "131072" (n0,r1) /local/domain/1/memory/target = "131072" (n0,r1) /local/domain/1/memory/videoram = "0" (n0,r1) /local/domain/1/device = "" (n0,r1) /local/domain/1/device/suspend = "" (n0,r1) /local/domain/1/device/suspend/event-channel = "" (n1) /local/domain/1/device/vbd = "" (n0,r1) /local/domain/1/device/vbd/51712 = "" (n1,r0) /local/domain/1/device/vbd/51712/backend = "/local/domain/0/backend/vbd/1/51712" (n1,r0) /local/domain/1/device/vbd/51712/backend-id = "0" (n1,r0) /local/domain/1/device/vbd/51712/state = "1" (n1,r0) /local/domain/1/device/vbd/51712/virtual-device = "51712" (n1,r0) /local/domain/1/device/vbd/51712/device-type = "disk" (n1,r0) /local/domain/1/device/vbd/51712/protocol = "arm-abi" (n1,r0) /local/domain/1/control = "" (n0,r1) /local/domain/1/control/shutdown = "" (n1) /local/domain/1/control/feature-poweroff = "" (n1) /local/domain/1/control/feature-reboot = "" (n1) /local/domain/1/control/feature-suspend = "" (n1) /local/domain/1/control/platform-feature-multiprocessor-suspend = "1" (n0,r1) /local/domain/1/control/platform-feature-xs_reset_watches = "1" (n0,r1) /local/domain/1/data = "" (n1) /local/domain/1/drivers = "" (n1) /local/domain/1/feature = "" (n1) /local/domain/1/attr = "" (n1) /local/domain/1/domid = "1" (n0,r1) /local/domain/1/store = "" (n0,r1) /local/domain/1/store/port = "1" (n0,r1) /local/domain/1/store/ring-ref = "233473" (n0,r1) /vm = "" (n0) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51 = "" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/name = "DomU" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/uuid = "63997893-f587-4bdc-9bf3-dd5c7614bb51" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/image = "" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/image/ostype = "linux" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/image/kernel = "/root/xen/Image" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/image/cmdline = "console=hvc0 root=/dev/xvda debug=/bin/sh" (n0,r1) /vm/63997893-f587-4bdc-9bf3-dd5c7614bb51/start_time = "0.80" (n0,r1) /libxl = "" (n0) /libxl/1 = "" (n0) /libxl/1/device = "" (n0) /libxl/1/device/vbd = "" (n0) /libxl/1/device/vbd/51712 = "" (n0) /libxl/1/device/vbd/51712/frontend = "/local/domain/1/device/vbd/51712" (n0) /libxl/1/device/vbd/51712/backend = "/local/domain/0/backend/vbd/1/51712" (n0) /libxl/1/device/vbd/51712/params = "/dev/loop0" (n0) /libxl/1/device/vbd/51712/script = "/etc/xen/scripts/block" (n0) /libxl/1/device/vbd/51712/frontend-id = "1" (n0) /libxl/1/device/vbd/51712/online = "1" (n0) /libxl/1/device/vbd/51712/removable = "0" (n0) /libxl/1/devic e/vbd/51712/bootable = "1" (n0) /libxl/1/device/vbd/51712/state = "1" (n0) /libxl/1/device/vbd/51712/dev = "xvda" (n0) /libxl/1/device/vbd/51712/type = "phy" (n0) /libxl/1/device/vbd/51712/mode = "w" (n0) /libxl/1/device/vbd/51712/device-type = "disk" (n0) /libxl/1/device/vbd/51712/discard-enable = "1" (n0) /libxl/1/dm-version = "qemu_xen_traditional" (n0) Thanks, Peng. > >It could be that there's some garbage in xenstore from a device that hasn't >been properly detached. > >Roger. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel

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